The Notifier works in conjunction with the Watchdog of your dd-wrt router. It will send out an email (using an ESMTP protocol) for any device that exceeds the connection limit you specified in the configuration.

If the notifier sends an email, it will then ignore that device for the next 10 minutes...after which time it will send another message but only if the limit is still exceeded. If during that time another device exceeds the limit, an email will be sent immediately regarding that device...but again ignore subsequent breaches of that devices limit until 10 minutes have passed.

If there is no breach of limit, the command "notifier" will return a blank line.

The email that is sent has much more information regarding who/what was breached...it provides (as an example):

From: "Router" <XXXXX@XXXXX.XXX>

ip 192.168.0.10 has 552 open connections
544 open connections on port 80
1 open connections on port 61819
1 open connections on port 24
1 open connections on port 57
2 open connections on port 5129
1 open connections on port 28381
1 open connections on port 3132
1 open connections on port 993